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wayslog merged 1 commit into from
Apr 3, 2016
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Update 07-04-operator-and-format.md #138

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2 changes: 0 additions & 2 deletions 07-type/07-04-operator-and-format.md
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Expand Up @@ -153,8 +153,6 @@ format!("{:?}", "Hello");

另外请记住：type这个地方为空的话默认调用的是`Display`这个trait。

还有两个比较有用的type是`e`和`E`。他们分别是小写字母和大写字母格式化，别在苦逼兮兮的写大小写转换函数了，Rust早帮你设计好了。

关于`:`号后面的东西其实还有更多式子，我们从上面的`{0:>0width$}`来分析它。

首先`>`是一个语义，它表示的是生成的字符串向右对齐，于是我们得到了 `0081`这个值。与之相对的还有`<`(向左对齐)和`^`(居中)。
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